Locomotive draft appliance



H. B. OATLEY.

LOCOMOTWE DRAFT APPLIANCE.

APPLlCATlON. FILED DEC.5 I9l^9.

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l' LI H. B. OATLEY.

L'OCOMOTIVE DRAFT APPLIANCE.

APPLLcATmN HLED nEc.5,1919.

Patented Mar. 29., 1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

HENRY B. OATLEY, 0F FLUSHING, NEW YORK, ASSIGNOR T0 THE SUPERHEATER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

Locoiuo'irvn DRAFT APPLIANCE.

Patented Mar. 29, 1921.

. Application filed December 5, 1919. Serial No. 342,590.

T 0 all whom it may concern Be it known that I, HENRY B. OATLEY, citizen of the United States, and resident of Flushing, Long Island, in the county of Queens and State of New York, have invented certain new and useful Improvements in Locomotive Draft Appliances, of which the following is a specification.

This invention relates to locomotives and particularly to the arrangement of the front end and the draft creating appliance.

In modern locomotive practice the amount o1 fuel consumed in the iirebox has increased to such proportions that considerable difficulty is experienced in getting rid of' the products or combustion at tlie fi'o1it end; and the purpose of the present invention is to eifect a front end arrangement which will improve these conditions. i

The invention is illustrated in three 'figures, of which Figure 1 is a longitudinal central section of a front end of a locomotive showing my improvement. Fig. 2 is a section on line 2-2r oi' Fig. 1. Fig. 3 1s a section on line 3 3 of Fig. 2.

The tubesheet 1 which separates the smokebox from the water and steam space has secured to it, in the usual way, the superheater fiues 2 and the fire tribes 3. These deliver the products oi combustion from the firebox to the smokebox in the usual manner. The dry pipe 4L delivers saturated steam to the superheater header 5 which steam circulates through the superheater units 6 and is returned by them in a superlieated state to the superheated steam chamber 7 of the header 5, whence it leaves for the valve chests through the steam pipes 88. The diaphragm 9, table plate 1() and deflector plate 11 set oii' a portion of the smokebox s ace in the usual manner. The gas flow tiirough the lues 2 is controlled by the damper 12.

All of the parts so far mentioned are of the usual construction.

In the form ordinarily given to the exhaust pipe 13 this pipe is cylindrical in form from its base to its tip and the space 14 at each side of this exhaust pipe below the table plate 10 becomes rather restricted as the size of this exhaust pipe is increased. In the form I give to the exhaust pipe 13 and to the nozzle 15, the cross section changes from circular at the base to one very much elongated from from? il@ back at the top.

In this manner I manage toincrease by a considerable amount the area left at each side of the exhaust pipe 13 below the table plate, thus making the passage for the products of combustion less restricted.

Above the table plate I give the petticoat pipe 16 and the'stack 17 shapes to correspend to tliesliape or' the nozzle and thereby likewise improve conditions for the egress of the gases. It will be `noted that the petticoat pipe 16 and the stack 17 are elongated fromufront to back to an extent corresponding tothe elongationof the nozzle 15. This secures a twofold advantage. In the first place, the flattening of the nozzle, petticoat pipe, and stack secures an increased eiecting elfect `of the steam jet issuing `irfim the nozzle` To this 4increased draft producing action per se I lay no claim as it is well known. By the particular position I give to the parts mentioned, however, I secure .i

`the advantage that gases going through the netting of the defiector plate 11 are freer to pass on each side of the and into the than they would be in case the stack and petticoat pipe were circular in section or were placed in any other position than that of my arrangement. In other words, the space on each side oi the petticoat pipe and stack is very much larger with my arrangement than it has been hitherto.

I am quite aware that it has been suggested to place a flattened nozzle and the accompanying flattened petticoat pipe and stack transversely to the axis of the locomotive. The advantages obtained in my arrangement are evidently not secured in suoli an arrangement and in fact quite the opposite happens, the gases being allowed to pass into the petticoat pipe and stack only along the front edge, the rear edge being practically ineii'ective. With my arrangement on the other hand, practically the entire circumference of the lower edges of the petticoat pipe and smoke stack admit products of combustion.

An additional though minor advantage which I wish to point out is that by flattening the smoke stack and placing it in the position I do I diminish the head resistance offered by the air when the locomotive is in motion.

It will be obvious that variations may be introduced in practice without departing petticoat pipe 1.6 y stack 1.7 or the petticoat pipe from the spirit of my invention. Thus,

' While I have shown a typical arrangement using apetticoat pipe, it Will be clear that the principle disclosed herein can be equally Well used in cases Where there is merely a Vstack'extension and no pettieoat pipe proper.

In fact, the particular netting arrangement Ihave shown in illustrating my invention vmust not be thought to be the only one with which my invention can be used. On the contrary, the advantages lof my invention can be secured with :almost any of the front vend arrangements hitherto proposed.

Wha-tl claim is: o

1. In apparatus ofthe class described, the (ombination of a flue sheet, fines with their ends secured-to said iue sheet, a cylindrical Y j smokebox extending from the iiue sheet, a 'smoke stack of an elongated cross-sectional ,smokebox extending from the flue sheet, a

smoke stackof an elongated cross-sectional shape extendinggthrough the Wall of the smokebox with its greater dimension-parallel to the axis of the sinokebox; a diaphragm plate, table plate, and delector plate inclesing the space into which the inner end of the stack extends; and an exhaust pipe, extending through the table plate, and alined With the smoke stack and having its upper portion and nozzle shaped to correspond to the shape of the stack.

3. In apparatus of the class described, the combination of a fine sheet, iiues with their ends secured to said flue sheet, a cylindrical smokebox extending from the fiue sheet, a smoke stack of an elongated cross-sectional shape extending through the wall of the smoke box With its greater dimension parallel to the axis oi the sinokebox; a, petti coat pipe of correspondingly elongated cross-section, alined with the stack; a dia-- phragm plate, table plate, and deleetor platt` inelosing the space surrounding` the stark and petticoat pipe; and an exhaust pipe, extending through the table plate, and alined with the smoke stack and pettieoat pipe and having its upper portion and nozzle shaped to correspond to their shape.

Signed at New York, in the county of New York and State oi New York, this 23d day ot' December, A. D. 1919.

HENRY B. OATLEY. 

